I was wondering how exactly did Kid travel back in time from 1020 AD to 1010 AD and save Serge thus causing the dimensional split?

And according to Belthasar he told Kid to do this and somehow knew about Kid in 2400 AD. How the hell?

So this leaves is it the same Kid we play as who saved Serge or is it a "future" Kid and if so what happened to that Kid?

Is this whole thing Project Kid cause I'm confused about that.


Small question unrelated to Kid: If Belthasar installed the Prometheus Circuit in 2400 AD then why would Lynx attempt to abduct Lucca in 1020 AD? Did she build the original model to be used 1400 years later?